Simple maths. lost 10%, when we could of gained 10%, so assuming a 20% rise in average wage. Which is £24k here in Wales, £28 across the UK, gives you £4,800 and £5,400. Put a little less than the calculated figure as its a bit of a generalisation But when you take into account we had less austerity than the EU, we have a stronger recovery than any of the european nations, and employment levels are high, it would suggest that 2m cheap labour individuals coming in has suppressed wages significantly.